Car roof



Nov. 28. 1939. K, Fh NYSTRQM 2,181,857

` CAR RooFA Filed Jan. l0, 1938 2 Sheets-Shee1tv l FIG-I.

l ll-Ill KARL F.NYSTROM BY )mw/ ATTORNEYS No'v. 28, 1939. K. F- NYsTRoM 2,181,857

CAR ROOF Filed Jan. 10, 1938 2 Sheets-sheet 2 INVENTOR KRL F. NYSTRM FIG.5.

fl/rYnylllull LIT Patented Nov. 28, 1939 UNITED STATES CAR ROOF

Karl F. Nystrom, Milwaukee, Wis., assigner, by

mesne assignments,

to Standard Railway Equipment Manufacturing Company, Hammond, Ind., a corporation of Delaware Application January 10, 1938, Serial No. 184,297

3 Claims.

The invention relates to car roofs and forms a continuation in part of my pending application Serial No; 665,414, filed April 10, 1933. It is the object of the invention to obtain a construction of roof having relatively high rigidity and one which is formed of an assembly of units, each constituting the weatherproof covering and the reenforcing frame therefor. To this end the invention consists in the construction as hereinafter set forth. l

In the drawings:

Figure 1 is a perspective view of a portion of my improved roof;

Figure 2 is a cross section thereof;

Figure 3 is a longitudinal section thereof;

Figure 4 is an enlarged cross section through the side plate;

Figure 5 is a sectional View on line 5-5 of Figure 3.

In the construction of railway car roofs it is usual to support the weatherprooiing sheets on a framework of carlines and purlines, or in some cases the sheets are fashioned to form trusses extending from eaves to eaves. With the present invention the roof is formed of a plurality of pressed sheet metal panned sections welded to each other and together constituting an arch extending transversely of the car, a series of such arches forming the complete roof. The flanges of the panned sections which are also united by welding form a rigid reenforcement, dispensing with the necessity of any separate carlines or purlines. In the parent application above referred to, the entire car body is formed of 35 units of the same general character, but the present application is directed only to the rooI structure which may be used either with a body as formerly described, or with some other type of body construction.

In detail, the roof is made up of a plurality of sheet metal sections comprising center sections A, intermediate sections B and side plate sections C. The sections have inwardly projecting reenforcing flanges D extending completely around the marginal edges of the sections. The tops of the sections are curved according to the equation Y=8 log X, the origin of the curve being indicated at E.

The center sections Aare preferably made from 50 No. 16 gauge steel plate, and the intermediate sections B from No. gauge steel plate; both plates having a width of 32 inches, which is a standard mill size. The side sections C are made from No. 7 gauge steel plate, which is considerably heavier than the plate used for either the (Cl. 10S-5.4)

center sections A, intermediate ,sections B, or side sections F. The width ofthe plate is 18 inches which is also a standard mill size.

The center and intermediate sections A and B, in addition to. being the same width are also the same length, as indicated in Figure 1. The side plate sections C, however, are twice as long as either the center or intermediate sections A and B (Figure l). The purpose of this arrangement is to cause the heavier gauge metal in the side plate sections to oppose any tendency of the center and intermediate pans to buckle along the latitudinal flanges. The heavier metal of the side plate sections is also desirable because these sections actas a longitudinal beam and strengthen the center portion of the car which is being constantly subjected to vertical stresses.

By making the roof into center, intermediate, and side plate sections, the former two may be made of comparatively light metal, because of the small proportion of the total load which they carry, while the side plate sections are made of heavier metal to withstand the greater stresses to which they are subjected.

Furring strips G are secured by bolts I-I along one longitudinal and one latitudinal flange D oi' each section. The furring is, of course, curved to conform with the curvature of the roof.

The roof is fabricated by taking the center, intermediate, and side plate sections and bolting together the mating ilanges. The sections may then be welded together both on the inside and outside of the anges to provide a unitary roof structure, which is self-supporting and requires no supplemental framework.

After all the sections have been welded t0- gether both longitudinally and latitudinally, the furring strips G are applied to the iianges D and are secured in place by the bolts H. The side plate sections C have straight edge furring I which constitute continuations of the side furring.

After the roof sections have been welded together, metal saddles J, which support the running board sections, are Welded along the top seam. The saddles are in the form of U-brackets provided with outwardly extending flanges K upon which the running board L rests. The running board may then be applied to the car roof or may be later applied when the roof has been assembled on the car.

The car roof, which is now completely welded and is provided with the necessary furring and With the necessary running board brackets and saddles may now be lifted by a suitable hoist and placed on the car sides and ends. The top flanges M of the side sections are then welded to the bottom anges of the side plate sections and the end flanges of the roof are welded to the downwardly extending anges N of the car ends to make the entire car body a unitary structure.

With the construction as above described the longitudinal andrlatitudinal i'langes of the different sections when welded to each. other lform reenforcements which impart a high degree of rigidity to the car.

What I claim as my invention is:

1. In a car roof, a plurality of sheet metal panned sections having depending anges-wded to each other and together constituting a transverse arch, and similar sections of heavier gauge metal forming side plates at -the base of the arch, said side plates being lcurved upward and inward to provide increased internal capacity while remaining within standard external clearance lines.

2. In 'a car roof, `a plurality of lsheet metal pannedsections having depending'iianges welded `to Y'each other and together constituting a transverse arch including one ory more center sections, side plate sections and sections intermediate said center and side plate sections, said sections being fashioned to provide increased internal capacity while remaining within standard external clearance lines, the abutting welded anges of said sections forming continuous carlines and purlines.

` 3. In a car roof, a plurality 'of sheet metal .panned sections having the depending flanges thereof weldedy to those of adjacent sections, each of fsaid sections being of a transverse dimension less than the distance between the ridge and eaves van'dtogeth'er forming a transverse arch extending frhin eaves' to eaves, with the portions adjacent tothe eaves curved upward and inward to provide increased internal capacity while re- -inainingwithin standard external clearance lines, the abutting welded flanges of said sections forming continuous carlines and purlines with one or `mor-'e intermediate -purlines between ridge .and leaves.

yKARL F. 

